Resonant LLC power IC offers easy design

17th March 2015

Barney Scott

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NXP has announced its TEA1916+TEA1995 GreenChip power solution, an easy-to-design Resonant LLC solution targeted for desktop PC/AiO, gaming consoles, notebook adapters and large panel TVs. The TEA1916+TEA1995 Platform offers high efficiency, especially at light loads of 10-30%, meeting efficiency regulations including Energy Star v6, CoC tier 2, 80+ platinum and EuP Iot6.

Three operating modes - burst, low power, and high power - make it possible to automatically select the best mode for each combination of power and control voltage, resulting in higher efficiency. The TEA1916 additionally features no-load power below 75mW, meeting and exceeding requirements of Energy STAR, DoE, CoC tier 2, etc. The LLC resonant topology also makes it easier to meet Common Mode Noise requirements and 200% peak power requirements when compared to a flyback topology.

It also uses Synchronous Rectifier (SR) control with adaptive gate drive, without minimum on-time and without reverse current, so the overall system guarantees increased efficiency over the entire load range.

Power supplies built on Resonant LLC topologies are often considered difficult to design and expensive. The TEA1916+TEA1995 Platform reverses this trend. Based on NXP’s novel cycle-by-cycle architecture, the TEA1916+TEA1995 Platform provides an easy-to-design power supply that comes closer to flyback with all the added advantages of Resonant LLC. The energy transfer from primary side to the output is controlled every switching cycle, offering a linear relationship between the control parameter and the required output power. The cycle-by-cycle technology also enables a more accurate burst mode and reduced audible noise.

“At NXP, we constantly strive to innovate. Our next-gen solution marks another significant step towards providing high efficiency energy savings combined with market leading ease-of-design,” said Marcel van Roosmalen, Power Solutions Segment Manager, NXP Semiconductors. “The global drive for energy efficiency underscores the importance of driving low-load efficiency performance that meets and exceeds regulations. With a simple and easy-to-use design offering all the advantages of Resonant LLC, we are making cost-effective, high efficiency power supplies more accessible around the globe.”

NXP will highlight its wireless charging/LLC solutions at booth #1101 during APEC, the Applied Power Electronics Conference and Exposition, held from 15^th to 19^th March in Charlotte, North Carolina, USA.

The TEA1916+TEA1995 Platform will be available in Q2 2015.